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Finding the Fourth Proportional to 14,235.81, 21,366.74 and 7,220.67

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Solution

The fourth proportional to 14,235.81, 21,366.74 and 7,220.67 is: 10,837.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,235.81 : 21,366.74 = 7,220.67 : x
  2. Step 2: Convert to fraction form
    14,235.81/21,366.74 = 7,220.67/x
  3. Step 3: Cross multiply
    14,235.81x = 21,366.74 × 7,220.67
  4. Step 4: Simplify right side
    14,235.81x = 154,282,142.41
  5. Step 5: Solve for x
    x = 154,282,142.41/14,235.81
  6. Step 6: Final answer
    x = 10,837.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.